Lots of activity on their phone and online, but they never really have anything to say about what they are reading, writing, doing, or texting. When they are online, they are beyond distracted. When they are off their phone (finally!), it's either placed face down right next to them, or it's in their hand/possession. And if you even glance at it, they will either get a weird, guilt look on their face, or immediately ask you, "What? What's the problem?"